Picking-motion for power-looms



(No Model.) a

S. HAMBLIN, PIGKING MOTION FOR POWER LOOMS.

No. 421,703. r Patented Feb. 18. 1890.

Witnesses, V v 51412214 501 UNITED STATES PATENT OFFICE.

SILVANUS HAMBLIN, OF NEW BEDFORD, MASSACHUSETTS.

PlCKlNG-MOTION FOR POWER-LOOMS.

SPECIFICATION forming part of Letters Patent No. 421,703, dated February18, 1890.

Application filed December 12, 1888. Serial No. 293,409. (No model.)

tain new and useful Improvement in Picking- Motions for Power-Looms, ofwhich the following is a specification.

The object of my invention is toprovide a simple and efficientpicking-motion for'looms which shall perform as much work as possible ina given time with a given power, and which shall work equally fast withthin or thick webs.

Figure l is a view of part of the loom, showing in side elevation mypicking-lever and throwing-cam- Fig. 2 is a sectional view showing theconnection of the cross-shaft with the picking-shaft and the bevelswhich make the connection.

The main obj ect in view in the construction of my picking-motion is theutmost simplicity possible, and the arrangement of the cam with relationto the lever must be such that with a given power the motion may be thequickest possible, and that said motion may take place with as littlejar as possible.

To this end I construct my device as fol- I lows: Under the frame of theloom and approximately parallel with the raceway of the shuttle there isa cross-shaft D, provided with a bevel-gear B at its extremity, as shownin Fig. 2. Across the end of this shaft and at each side of the loomthere extends a pickershaft H,provided with a bevel-wheel (1, gearingwith that upon the cross-shaft. This shaft is held in the bearings E,and between two of these bearings there is fasteneda cam A, shaped asshown in Fig. 1, and of course rotating with the shaft H. Inthe path ofthis cam there is situated a picker-lever N, pivoted below the cam at Fand kept in position by any suitable means, as a strap F. Thispicker-lever is so balanced that it tends to remain in the positionshown in Fig. 1, to which position it is also carried by the action ofthe shuttle in coming back against it. The upper end of this lever movesin the raceway of the shuttle, as

5 shown, and is of course actuated by the cam A, which moves over and tothe left, so that its convexisurfaoe' comes against the back of thelever. The motion as at first produced isslower than it becomes laterduring'the contact of the cam with the lever. This produces a gradualacceleration of the upper end of the picker-lever and a consequentlessening of the strain to which the cam is subjected, thus allowing ofmuch greater speed without straining the loom. In this manner the motionof the picker-lever is accelerated; but this is not the only advantagewhich arises from my construction, as the end of the picker-lever worksthrough a long slot in the raceway and acts directly against the shuttleitself without intermediate devices. At the time that the cam commencesits downward motion against the back of the lever and the said cambegins to accelerate the motion of the picker-lever said pickerlever hasjust about reached the vertical position.

In consequence of these various advantageous constructive features thefollowing points of superiority appear in my device.

First. Saving in power by its very light running.

Second. Far greater production by being able to run far faster than anyother loom, a loom having my invention applied having often gone at therate of three hundred and thirty-six picks a minute. An ordinary loommakes one hundred and eighty picks a minute when going at a fair averagespeed.

Third. The original cost of construction is very small.

Fourth- My device can be used as successfully upon broad as upon narrowlooms.

Fifth. My device works equally well upon light or heavy goods.

What I claim is-- 1. In aloom, a picking-lever placed at the loom-sideand projecting into the path of the shuttle, in combination with arevolving cam sweeping over the back of said lever in a downwarddirection and acting thereon be tween its pivot and itsshuttle-operating end, and a revolving shaft carrying said cam andmounted at the loom-side, substantially as described.

2. In a loom, a cross-shaft and a pickersaid cam, the cam actingon saidleverbetween shaft located at the loom-side and bearing a its pivot andits operating end, substantially cam revolving downward while in action,in as described.

combination with means, as the beveled gears, SILVANUS IIAMBLIN. 5connecting said shafts, and a picking-lever Witnesses:

also located at the loom-side and projecting STEPHEN M. HAMBLIN,

into the path of the shuttle and actuated by XVILLIAM H. GOLDSMITH.

